get a grip (on yourself)
US /ɡɛt ə ɡrɪp (ɒn jʊərˈsɛlf)/
UK /ɡɛt ə ɡrɪp (ɒn jʊərˈsɛlf)/

1.
mengendalikan diri, menenangkan diri
to make an effort to control your emotions and behave more calmly
:
•
Come on, get a grip on yourself! There's no need to cry.
Ayolah, kendalikan dirimu! Tidak perlu menangis.
•
She needs to get a grip and stop panicking about the exam.
Dia perlu mengendalikan diri dan berhenti panik tentang ujian.